“Some of the things that will affect that stability is water flow and temperature below the ice. Air temperature, sunshine, water runoff both the flow and the solutions that are added to the ice that may affect its freezing or melting point. Organic life and decomposition along the ice will also affect the ice.”
Police say to never go on ice that is less than 4 inches and also advise to keep pets on leashes when walking them near area waterways.